feat(a2a): tools as skills (strands-agents#287)

Author: jer96

src/strands/multiagent/a2a/__init__.py

@@ -9,6 +9,6 @@
     A2AAgent: A wrapper that adapts a Strands Agent to be A2A-compatible.
 """
 
-from .agent import A2AAgent
+from .server import A2AServer
 
-__all__ = ["A2AAgent"]
+__all__ = ["A2AServer"]

src/strands/multiagent/a2a/agent.py renamed to src/strands/multiagent/a2a/server.py

@@ -21,7 +21,7 @@
 logger = logging.getLogger(__name__)
 
 
-class A2AAgent:
+class A2AServer:
     """A2A-compatible wrapper for Strands Agent."""
 
     def __init__(
@@ -32,6 +32,7 @@ def __init__(
         host: str = "0.0.0.0",
         port: int = 9000,
         version: str = "0.0.1",
+        skills: list[AgentSkill] | None = None,
     ):
         """Initialize an A2A-compatible agent from a Strands agent.
 
@@ -42,6 +43,7 @@ def __init__(
             host: The hostname or IP address to bind the A2A server to. Defaults to "0.0.0.0".
             port: The port to bind the A2A server to. Defaults to 9000.
             version: The version of the agent. Defaults to "0.0.1".
+            skills: The list of capabilities or functions the agent can perform.
         """
         self.host = host
         self.port = port
@@ -56,6 +58,7 @@ def __init__(
             agent_executor=StrandsA2AExecutor(self.strands_agent),
             task_store=InMemoryTaskStore(),
         )
+        self._agent_skills = skills
         logger.info("Strands' integration with A2A is experimental. Be aware of frequent breaking changes.")
 
     @property
@@ -88,18 +91,33 @@ def public_agent_card(self) -> AgentCard:
             capabilities=self.capabilities,
         )
 
-    @property
-    def agent_skills(self) -> list[AgentSkill]:
-        """Get the list of skills this agent provides.
+    def _get_skills_from_tools(self) -> list[AgentSkill]:
+        """Get the list of skills from Strands agent tools.
 
         Skills represent specific capabilities that the agent can perform.
         Strands agent tools are adapted to A2A skills.
 
         Returns:
             list[AgentSkill]: A list of skills this agent provides.
         """
-        # TODO: translate Strands tools (native & MCP) to skills
-        return []
+        return [
+            AgentSkill(name=config["name"], id=config["name"], description=config["description"], tags=[])
+            for config in self.strands_agent.tool_registry.get_all_tools_config().values()
+        ]
+
+    @property
+    def agent_skills(self) -> list[AgentSkill]:
+        """Get the list of skills this agent provides."""
+        return self._agent_skills if self._agent_skills is not None else self._get_skills_from_tools()
+
+    @agent_skills.setter
+    def agent_skills(self, skills: list[AgentSkill]) -> None:
+        """Set the list of skills this agent provides.
+
+        Args:
+            skills: A list of AgentSkill objects to set for this agent.
+        """
+        self._agent_skills = skills
 
     def to_starlette_app(self) -> Starlette:
         """Create a Starlette application for serving this agent via HTTP.

tests/multiagent/a2a/conftest.py

@@ -22,6 +22,11 @@ def mock_strands_agent():
     mock_result.message = {"content": [{"text": "Test response"}]}
     agent.return_value = mock_result
 
+    # Setup mock tool registry
+    mock_tool_registry = MagicMock()
+    mock_tool_registry.get_all_tools_config.return_value = {}
+    agent.tool_registry = mock_tool_registry
+
     return agent